Engagement Game


I was reading some guys wondering about whether it was worth getting married and thinking perhaps what would be useful for such men, or men in the process of looking to get married, for engagement game.

During the initial pickup process, men select for the various traits that matter to them, and after they get married, well, it's maintenance from there. But what about that wide gap between the initial attraction building process and marriage?

What observations can married men make about what worked, or didn't, for their engagement?
What red flags apply or become apparent during engagement that are less critical during the first dates?
Should men dump a wad of money on an engagement ring?
What "game" works to help best negotiate good marital conditions moving forward?
How long ideally should the engagement process be?
Any experience with pre-marital couples counseling?